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Inboxwireby BufferSol
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Pricing

Same core features. About half the price.

Annual billing saves 2% to 13% on plans sold both ways.

  • Developer

    Free forever, for a first integration

    $0free

    Start free

    No credit card needed.

    • 3 mailboxes forever
    • All API features
    • Self-host or Cloud
    • Community support
    • No card

  • Cloud Starter

    We host it, for your first customers

    $24.99per month

    Choose Cloud Starter

    Cancel anytime from your account.

    • 25 mailboxes
    • Bring your own OAuth clients
    • US region
    • 30 day webhook delivery log
    • 1 environment

  • Cloud Growth

    Most popular

    We host it, for a growing customer base

    $1,043.88per year

    Choose Cloud Growth

    Cancel anytime from your account.

    • 100 mailboxes, $0.99 per extra
    • 3 environments
    • 90 day delivery log
    • Priority support, 1 business day
    • Remove connect page badge

  • Self-host

    Run it on your servers

    $708per year

    Choose Self-host

    Cancel anytime from your account.

    • Unlimited instances and mailboxes
    • Unlimited API calls
    • All updates
    • Email support, 2 business days
    • Price locked 24 months

What your mailboxes cost

11000

Cloud Growth includes 100 mailboxes. Each one above that is $0.99 a month, prorated daily. Self-host has no mailbox limit.

Monthly bill for 100 mailboxes

  • Inboxwire Cloud$99.99 a month

    Cloud Growth

  • Inboxwire Self-host$59 a month

    Unlimited mailboxes, billed yearly

  • EmailEngine (emailengine.app)$120.83 a month

    $1,450 a year, unlimited mailboxes

  • Nylas$199 a month

    Pro + 75 extra, published monthly rate

Compared with the $1,450/yr licence at emailengine.app and Nylas' published monthly rates, read 3 Nov 2026. Competitor prices change; check theirs before you decide.

Billing questions

Can I cancel anytime?

Yes. Cancel in two clicks from your account. Self-host licences stay valid until the end of the term plus 30 days.

Is my price locked?

Yes, for 24 months.

What happens if I go over my mailbox limit on Cloud?

We never disconnect mailboxes for quota. You get an email and an in-app warning at 90 percent, and extra mailboxes are $0.99 each per month, prorated daily.

Do I need a card for the Developer tier?

No. 3 mailboxes, all API features, free forever.

Can I pay monthly instead of yearly?

Self-host and Cloud Growth can be billed monthly or yearly, and annual is pre-selected. Cloud Starter is monthly.

Is the CASA Readiness Kit extra?

No. It is included on every plan, including Developer. You still hire your own assessor; we never resell an assessment.